title: Rupatadine.
abstract: 8-chloro-11-{1-[(5-methyl-pyridin-3-yl)meth-yl]piperidin-4-yl-idene}-6,11-di-hydro-5H-benzo[5,6]cyclo-hepta-[1,2-b]pyridine), C26H26ClN3, the dihedral angle between the mean planes of the chloro-phenyl and cyclo-hepta-[1,2-b]pyridinyl rings fused to the cyclo-heptane ring is 56.6 (1)°. The mean planes of the cyclo-hepta-[1,2-b]pyridinyl and 5-methyl-pyridin-3-yl rings are twisted by 64.9 (4)°. The central piperizene group is in a slightly distorted chair configuration. A weak intra-molecular C-H⋯N inter-action is observed between the cyclo-hepta-[1,2-b]pyridinyl and piperidin-4-yl-idene moieties.
authors.affiliation: Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India.
authors.forename: Manpreet
authors.initials: M
authors.lastname: Kaur
authors.forename: Jerry P
authors.initials: JP
authors.lastname: Jasinski
authors.forename: Zane A
authors.initials: ZA
authors.lastname: Luopa
authors.forename: Neeraj
authors.initials: N
authors.lastname: Kumar
authors.forename: Nilesh G
authors.initials: NG
authors.lastname: Patel
authors.forename: Omprakash
authors.initials: O
authors.lastname: Gudaparthi
authors.forename: H S
authors.initials: HS
authors.lastname: Yathirajan